Extract vendored kubernetes/kubernetes client library dependencies at build time

Makefile

KUBERNETES_VERSION ?= v1.1.3
KUBERNETES_SOURCE_URL = https://github.com/kubernetes/kubernetes/archive/v$(KUBERNETES_VERSION).tar.gz

LOCAL_SOURCES := $(shell find local -type f)

.PHONY: prepare
prepare: vendor/k8s.io/kubernetes/.available vendor/k8s.io/kubernetes/.lifted_godeps $(LOCAL_SOURCES:local/%=vendor/%)

# Lift a source tree into the vendor tree, skipping Godeps
vendor/%/.available: build/$(KUBERNETES_VERSION)/%/.available
        mkdir -p $(@D)
        rsync -a --exclude=Godeps $(<D)/ $(@D)

# For a given source tree, lift all its godeps into the vendor tree
vendor/%/.lifted_godeps: build/$(KUBERNETES_VERSION)/%/.available
        mkdir -p vendor/
        find $(<D) -type d -name Godeps -exec rsync -a '{}/_workspace/src/' vendor/ ';'
        touch $@

vendor/%: local/%
        mkdir -p $(@D)
        cp $< $@

build/$(KUBERNETES_VERSION)/k8s.io/kubernetes/.available:
        mkdir -p $(@D)
        curl -sSLf $(KUBERNETES_SOURCE_URL) |\
                tar --wildcards -C $(@D) --strip-components=1 -zx
        touch $@

.PHONY: clean
clean::
        rm -rf build vendor

This is for use with GOVENDOREXPERIMENT=1 instead of Godeps.